含油率的英文：
oil length

oil是什么意思：
n. 油；石油；油画作品
v. 给...供油；使涂满油；加燃油；融化
adj. 石油的；产油的

pecan oil (=hickory oil)
美洲山核桃油

The oil is carried to the oil refinery by pipelines.
石油通过输油管输送到炼油厂。

The traditional carding oil has been replaced by mineral oils
用矿物油代替惯用的梳毛油。

We get oil from oil wells.
我们从油井获得石油。

Oil absorbency: The capability of a paper to absorb oil.
吸油性:纸张的吸油能力。

length是什么意思：
n. 长度；时间的长短；篇幅，放映时间；（某物的）一段；音长

The length of the chain molecule is proportional to the kinetic chain length
链分子的长度与动力学链长成正比。

The length of that pen is only a finger.
那支钢笔只有一指长。

The standard length in France is the meter.
法国的标准长度是米。

The documents varied in length and quality.
这些文件在篇幅和质量方面是各不相同的。

a book the length of `War and Peace'
像《战争与和平》篇幅那样长的书